The gloomy dungeon of the Santo Oficio gaol in Logroño, northern Spain, is packed with prisoners accused of witchcraft. The sound of mystical chanting drifts out through the bars. It is a desperate cry for help that travels through valleys and mountains until it reaches the hamlet of Zugarramurdi. A young boy wakes up suddenly in the middle of the night...
| Directing | César Urbina Vitoria | Director |
| Art | Jorge Liquete | Art Direction |
| Art | Jorge Liquete | Storyboard Artist |
| Art | Jorge Liquete | Creative Director |
| Production | Ángel Urbina | Producer |
| Writing | Ángel Urbina | Writer |
| Production | Nieves Martín | Production Assistant |
| Sound | Jordi Civit | Sound |
| Sound | Emilio Escobar | Sound |
| Visual Effects | Pablo Aguirre | Digital Compositor |
| Visual Effects | César Urbina Vitoria | Animation |
| Visual Effects | César Urbina Vitoria | Character Designer |
| Visual Effects | Ramón Verdugo | Animation |
| Visual Effects | Ramón Verdugo | Character Designer |
| Visual Effects | Mariona Rodríguez | Animation |
| Visual Effects | Mariona Rodríguez | Character Designer |
| Visual Effects | Martín Aramburu | Animation |
| Visual Effects | Martín Aramburu | Character Designer |
| Visual Effects | Nadia Khairat Gómez | Animation |
| Visual Effects | Nadia Khairat Gómez | Character Designer |
| Visual Effects | Maite Yurrebaso | Animation |
| Visual Effects | Maite Yurrebaso | Character Designer |
| Visual Effects | Leonardo Pérez | Animation |
| Visual Effects | Diego Leonardo Pérez | Character Designer |
| Visual Effects | Amador Rehak | Matte Painter |
| Visual Effects | Jorge Liquete | Matte Painter |
| Visual Effects | Elena San Miguel | Matte Painter |
| Sound | Diego Montoto | Music |
